Do not buy!
I was very excited when this trick first arrived, but was unprepared for the horror that was inside the box. The first time I tried to use it the glass started to leak; imagine you're on stage when your glass starts to leak! It was made out of cheap plastic, and it was just sloppily glued together. I sent it back, and penguin magic sent me another one. It was leaky also. So I sent it back too and they sent me yet another one. That one was leaky also! I tried to send it back, but they said they were out of milk glasses. They did give me my money back.